package netty.simple;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;

/**
 * description:
 * author:zt
 * date:2021-09-19
 */
public class NettyClient {
    public static void main(String[] args) throws InterruptedException {
        //客户端需要一个事件循环组
        NioEventLoopGroup group = new NioEventLoopGroup();

        try {
            //创建客户端启动对象
            Bootstrap bootstrap = new Bootstrap();

            bootstrap.group(group) //设置线程组
                    .channel(NioSocketChannel.class) //设置客户端通道的实现类（反射）
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            socketChannel.pipeline().addLast(new NettyClientHandler()); //加入自己的处理器
                        }
                    });

            System.out.println("客户端 is ok...");

            //启动客户端去连接服务器端
            ChannelFuture cf = bootstrap.connect("127.0.0.1", 6668).sync();
            //给关闭通道进行监听
            cf.channel().closeFuture().sync();
        }finally {
            group.shutdownGracefully();
        }
    }
}
